Yahoo's User Interface Library (YUI) has been made publicly available on GitHub, allowing developers to access and contribute to the project at http://github.com/yui. The announcement highlights the new YUILibrary and YUIDoc, as well as davglass’ github-trac plugin. The move to GitHub marks a significant step in making YUI more accessible to the developer community, and users are encouraged to explore the resources available, including a highly recommended Git FAQ. The information was shared by Chris Wanstrath, known by the handle @defunkt.